JPH09226386A - Engine support device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a spring constant as well as an allotted load in a rear side engine mount on an engine mounted frame elastically suspended on a car body and to improve vibrationproofing performance. SOLUTION: When the shortest distance L from an engine roll center 10 to a center of an engine mount and a roll stopper clearance D are set as Df/ Lf≪Db/Lb and Dl/Ll≪Db/Lb and Dr/Lr≪Db/Lb in a stationary state, contact with a stopper Sb2 is not made on a rear side engine mount 2b at the time of engine roll and an engine 1 is supported at three points of front, left and right engine mounts, and accordingly, it is possible to improve comfortability in an indoor space by extensively restraining noise in a vehicle room.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine supporting device including an engine mounting frame vibration-isolated and supported on a vehicle body, and an engine mount having a stopper for limiting the roll of the engine.

[0002]

2. Description of the Related Art As an engine vibration isolating means, an engine mount is interposed between an engine mounting frame which is vibration-isolated and supported on a vehicle body, and a double vibration isolating mechanism for absorbing and absorbing the vibration of the engine. The structure is valid.

As the engine mounting frame, for example, as described in Japanese Utility Model Publication No. 2-41877,
There is known a subframe which is vibration-isolated and supported on a vehicle body through an insulator composed of an elastic body. Further, as the engine mount, for example, JP-A-63-769 is known.
As described in JP-A-30, an engine mount having an outer cylinder having a stopper on its inner peripheral surface and an inner cylinder concentrically coupled to the outer cylinder via an elastic body is known.

[0004]

In the conventional engine support device having such a double vibration isolation structure, the rigid resonance frequency fo in the rigid body using the subframe as a mass and the insulator interposed between the subframe and the vehicle body as the spring is fo. In the area of √2 times (√2 × fo) or more, a large vibration isolation effect can be obtained, but in the frequency area of (√2 × fo) or less, the vibration is amplified and the noise becomes large. was there.

Particularly, the exciting force from the engine is large in a four-cylinder engine having a small number of cylinders, and the frequency range of the secondary component which is the main exciting force of the four-cylinder engine is about 20.
Since it becomes higher than Hz, the lowest order rigid body resonance frequency in the sub-frame is around 50 Hz,
Noise increases in the low engine speed range.

There are two possible countermeasures to this problem: reducing the rigid body resonance frequency fo in the sub-frame, or connecting the engine mount to a position where noise is less likely to occur.

First, when an attempt is made to reduce the rigid body resonance frequency fo, the limit frequency (√
In order to set 2 × fo) to 20 Hz or lower, which is the lower limit of the frequency range of the secondary component in a 4-cylinder engine, the rigid body resonance frequency fo of the subframe is set to (√2 × fo) <2
From the relationship of 0, it is necessary to make fo <14.1. In order to realize this, the weight of the subframe must be increased by 12.5 times or the spring constant of the insulator must be increased by 1 / 12.5 times, and the weight increase of the subframe or the spring constant of the insulator must be significantly increased. It is unavoidable that the steering stability deteriorates due to a large decrease.

Therefore, for example, as shown in FIG. 8, when the engine mount is arranged on the subframe 3 supported by the vehicle body (not shown) through the insulator 5, the engine mount is set to the rigid body mode of the subframe 3. Measures are taken to avoid the abdomen that has a large amplitude.

By the way, in order to support the static load of the engine and to secure the reaction force that limits the engine roll, the engine mount is mounted on the front side and the rear side and the left side and the right side of the engine, or the left front side and the left rear side and the right front side. It is preferable to support at four positions on the right and rear sides or at three positions on the rear side and the left and right sides. FIG. 9 shows a T-shaped sub-frame 3 that can be adopted in a small vehicle and has a large vibration-damping effect because it has little elastic vibration, as a specific example of the engine-mounted frame. Among the above-mentioned arrangement conditions of the engine mount, it is applicable to the engine mounting frame having such a shape that it is supported by three positions on the rear side and the left and right sides or by four positions on the front and rear sides and the left and right sides. However, in reality, the rear engine mount has to be fixed near the antinode portion (the T-shaped crossing portion 8 in FIG. 9) having a large amplitude, and in the region where the engine rotation speed is low, after all, It is inevitable that engine noise will increase.

Therefore, a method is adopted in which the engine is supported at four positions, the front and rear sides and the left and right sides, and the spring constant of the rear engine mount is reduced to perform vibration isolation. FIG.
Shows a specific example of the above-described engine support device in an FF vehicle (engine before frontal / horizontal drive vehicle). This is because the engine 1 is mounted on front and rear engine mounts 2f and 2b on a subframe 3 that is vibration-isolated and supported on the vehicle body 4, and is supported on the vehicle body 4 via left and right engine mounts 2l and 2r. doing. Therefore, the damping effect is improved by reducing the spring constant as well as the shared load in the rear engine mount 2b.
It is possible to reduce the vibration input from the to the sub-frame 3.

However, as described above, the frequency range in which the subframe amplifies the vibration to increase the noise is (√
2 × fo) or less, and the rigid body resonance frequency fo = 50 Hz
Then, the frequency region corresponding to this is about 70 Hz or less. Then, the engine rotation speed having the secondary component in the four-cylinder engine in this frequency range is about 2100.
Below rpm. Traveling in this rotational speed range corresponds to acceleration at a vehicle speed of 0 km / h or when traveling at a constant vehicle speed. Especially, at acceleration from a vehicle speed of 0 km / h, the vehicle speed is low and engine noise is noticeable. Further reduction of engine noise is required.

In addition, such an engine support device has a large engine load when accelerating from a vehicle speed of 0 km / h, so that the engine 1 is mounted on each engine mount centering on the engine roll center 10 as shown in FIG. 2 will fall rearward until it comes into contact with the stopper, and the spring constant of each engine mount 2 will increase sharply, reducing the anti-vibration effect.

In particular, as in the FF vehicle in which the final drive gear 6 of the transaxle connected to the engine 1 is offset rearward, the rear engine mount 2b generally has a larger share load than other engine mounts. Therefore, it is necessary to increase the spring constant to some extent. Therefore, as shown in FIG. 12A, when the elastic body Rb2 of the rear engine mount 2b is made thick to increase the spring constant, the stopper clearance Db between the elastic body Rb2 and the stopper Sb2 becomes the stopper clearance Df of the front engine mount 2f. Since it is smaller than
As shown in, the rear engine mount 2b comes into contact with the stopper Sb2 before the front engine mount 2f even if the roll angle is the same.

Therefore, even if the spring constant of the rear engine mount 2b is reduced to a predetermined value, the engine roll will eventually be supported by the rear side and the left and right engine mounts at three points. As a result, sufficient vibration damping effect and noise suppression cannot be obtained, and comfort is impaired.

An object of the present invention is to pay attention to such a conventional problem and to find a roll stopper clearance between an engine mount and a stopper for limiting a roll and a shortest distance from an engine roll center to a center of each engine mount. By devising, the spring constant of the rear engine mount can be reduced to solve the above problem.

[0016]

To this end, according to the present invention, there is provided an engine support device according to claim 1, wherein an engine mount is mounted on a vehicle body at four positions, namely, a front side and a rear side, and a left side and a right side. Each of these engine mounts has a stopper for limiting the roll of the engine, and at least one of the engine mounts for the front side and the rear side of the engine, or a pair for the left side and the right side of the engine. The engine mount of is an engine support device in which the engine is supported on the vehicle body through an engine mounting frame that is vibration-proofed on the vehicle body, where Df is a roll stopper clearance of the front engine mount, and Lf is an engine roll center to the front engine mount. Shortest distance to the center of the vehicle Db: Rear engine Und roll stopper clearance Lb: Shortest distance from engine roll center to center of rear engine mount Dl: Left engine mount roll stopper clearance Ll: Shortest distance from engine roll center to left engine mount center Dr : Roll stopper clearance of the right engine mount Lr: Df / Lf << Db / Lb and Dl / Ll << Db / Lb in the stationary state, where the shortest distance from the engine roll center to the center of the right engine mount , Dr / Lr << Db / Lb (1).

That is, if the shortest distance L from the engine roll center to the center of the engine mount and the roll stopper clearance D in the engine mount are set based on the relational expression (1), when the engine rolls, Since the engine is supported at three positions on the front side, the left side and the right side so that the roll stopper clearance Db of the side engine mount does not become 0, it is possible to reduce a large share load in the rear side engine mount.

According to a second aspect of the present invention, there is provided an engine mount device according to a second aspect of the present invention, in which an engine is supported on a vehicle body at four positions, namely, a front side and a rear side, and a left side and a right side, via the engine mount. Of the engine mounts, at least a pair of engine mounts for the front side and the rear side of the engine, or a pair of engine mounts for the left side and the right side of the engine have a stopper that limits the roll of the engine In the engine supporting device for supporting the engine on the vehicle body through the engine mounting frame, Df: Roll stopper clearance of the front engine mount, Lf: Shortest distance from the engine roll center to the center of the front engine mount, Db: Roll stopper for rear engine mount Alance Lb: The shortest distance from the engine roll center to the center of the rear engine mount Dl: The roll stopper clearance of the left engine mount Ll: The shortest distance from the engine roll center to the center of the left engine mount Dr: Right engine mount Roller clearance Lr: 2 × (Df / Lf) ≦ Db / Lb and 2 × (Dl / Ll) ≦ in a stationary state, where the shortest distance from the engine roll center to the center of the right engine mount Db / Lb and 2 * (Dr / Lr) ≤Db / Lb (2) are satisfied.

That is, based on the relational expression (2), the shortest distance L
And the roll stopper clearance D are set, the roll of the engine causes the roll stopper clearances D of the front side and the left and right engine mounts to become 0 and contact the stopper, and even if elastic deformation of the stopper occurs thereafter, the rear side Since the roll stopper clearance of the engine mount does not reach 0, a further sufficient vibration damping effect can be obtained.

According to another aspect of the present invention, there is provided an engine mount device according to claim 3, wherein the engine is supported on the vehicle body at four positions, namely, on the front side and the rear side, and on the left side and the right side, through the engine mounts. Of the engine mounts, at least a pair of engine mounts for the front side and the rear side of the engine, or a pair of engine mounts for the left side and the right side of the engine have a stopper that limits the roll of the engine In the engine supporting device for supporting the engine on the vehicle body through the engine mounting frame, Df: Roll stopper clearance of the front engine mount, Lf: Shortest distance from the engine roll center to the center of the front engine mount, Db: Roll stopper for rear engine mount Alance Lb: The shortest distance from the engine roll center to the center of the rear engine mount Dl: The roll stopper clearance of the left engine mount Ll: The shortest distance from the engine roll center to the center of the left engine mount Dr: Right engine mount Roller stopper clearance Lr: Df / Lf ≈Dl / Ll ≈Dr / Lr << Db / Lb ・ ・ ・ (3), when it is the shortest distance from the engine roll center to the center of the right engine mount It is characterized by satisfying the relationship of.

That is, based on the relational expression (3), the shortest distance L
And roll stopper clearance D are set, the roll stopper clearance Df of the front engine mount and the roll stopper clearance Df of the front engine mount are set so that the roll stopper clearance Db of the rear engine mount does not become 0 when the engine is rolled.
Roll stopper clearance D on the left engine mount
l and the roll stopper clearance Dr of the right engine mount become 0 at the same time, the engine roll center position varies from the engine roll center to the center of each engine mount due to the deviation of the contact time with the stopper in each engine mount. It is possible to prevent the shortest distance of (3) from changing and break the relationship of Expression (3), and it is possible to sufficiently reduce the increase in the shared load in the rear engine mount.

According to a fourth aspect of the present invention, there is provided an engine support device in which an engine is supported on a vehicle body at four positions, a front side and a rear side, and a left side and a right side, through engine mounts. Of the engine mounts, at least a pair of engine mounts for the front side and the rear side of the engine, or a pair of engine mounts for the left side and the right side of the engine have a stopper that limits the roll of the engine In the engine supporting device for supporting the engine on the vehicle body through the engine mounting frame, Df: Roll stopper clearance of the front engine mount, Lf: Shortest distance from the engine roll center to the center of the front engine mount, Db: Rear engine mount roll stopper clear Lb: Shortest distance from the engine roll center to the center of the rear engine mount Dl: Roll stopper clearance of the left engine mount Ll: Shortest distance from the engine roll center to the center of the left engine mount Dr: Right engine mount Roll stopper clearance Lr: 2 x (Df / Lf) ≈ 2 x (Dl / Ll) ≈ 2 x (Dr / when the minimum distance from the engine roll center to the center of the right engine mount is set. Lr) ≤Db / Lb (4) is satisfied.

That is, based on the relational expression (4), the shortest distance L
And the roll stopper clearance D are set, even if the roll stopper clearance D of the front, left and right engine mounts becomes 0 due to the roll of the engine and the stopper elastically deforms, the roll stopper clearance of the rear engine mount is generated. Is not 0,
With respect to claim 3, a sufficient vibration damping effect can be obtained.

According to a fifth aspect of the present invention, there is provided an engine support device for supporting an engine on a vehicle body at four positions, namely, a front side and a rear side, and a left side and a right side, via engine mounts. Of the engine mounts, at least a pair of engine mounts for the front side and the rear side of the engine, or a pair of engine mounts for the left side and the right side of the engine have a stopper that limits the roll of the engine In the engine supporting device for supporting the engine on the vehicle body through the engine mounting frame, Df: Roll stopper clearance of the front engine mount, Lf: Shortest distance from the engine roll center to the center of the front engine mount, Db: Rear engine mount roll stopper clear Lb: Shortest distance from the engine roll center to the center of the rear engine mount Dl: Roll stopper clearance of the left engine mount Ll: Shortest distance from the engine roll center to the center of the left engine mount Dr: Right engine mount Roller stopper clearance Lr: Shortest distance from the engine roll center to the center of the right engine mount L'fa: Shortest distance from the virtual line connecting the centers of the left and right engine mounts to the center of the front engine mount L ' ba: When the shortest distance from the imaginary line connecting the centers of the left and right engine mounts to the center of the rear engine mounts, Dl / Ll << Df / Lf and Dr / Lr << Df / Lf in a stationary state And Dl / Ll << Db / Lb and Dr / Lr << Db /Lb...(5) Df / L'fa << Db / L'ba ... (6).

That is, if the shortest distance L and the roll stopper clearance D are set based on the relational expressions (5) and (6), the roll stopper clearance Db of the rear engine mount will not become 0 when the engine is rolled. First, the roll stopper clearance Dl of the left engine mount and the roll stopper clearance Dr of the right engine mount become 0, and then the roll stopper clearance Df of the front engine mount becomes 0. Even when the imaginary line connecting the mounts is used as the roll center, it is possible to reduce the shared load on the rear engine mount by supporting it at three positions, the front side, the left side, and the right side.

According to a sixth aspect of the present invention, there is provided an engine support device for supporting an engine on a vehicle body at four positions, namely, a front side and a rear side, and a left side and a right side, through engine mounts. Of the engine mounts, at least a pair of engine mounts for the front side and the rear side of the engine, or a pair of engine mounts for the left side and the right side of the engine have a stopper that limits the roll of the engine In the engine supporting device for supporting the engine on the vehicle body through the engine mounting frame, Df: Roll stopper clearance of the front engine mount, Lf: Shortest distance from the engine roll center to the center of the front engine mount, Db: Rear engine mount roll stopper clear Lb: Shortest distance from the engine roll center to the center of the rear engine mount Dl: Roll stopper clearance of the left engine mount Ll: Shortest distance from the engine roll center to the center of the left engine mount Dr: Right engine mount Roller stopper clearance Lr: Shortest distance from the engine roll center to the center of the right engine mount L'fa: Shortest distance from the virtual line connecting the centers of the left and right engine mounts to the center of the front engine mount L ' ba: 2 × (Dl / Ll) ≦ Df / Lf and 2 × (in the stationary state, where the shortest distance from the imaginary line connecting the centers of the left and right engine mounts to the center of the rear engine mounts Dr / Lr) ≤Df / Lf and 2 × (Dl / Ll) ≤Db / Lb and 2 * (Dr / Lr) ≤Db / Lb ... (7) 2 * (Df / L'fa) ≤Db / L'ba ... (8) It is a thing.

That is, when the shortest distance L and the roll stopper clearance D are set based on the relational expressions (7) and (8), the roll stopper clearances D of the front side, the left side and the right side engine mounts are 0 depending on the roll of the engine.
Therefore, the roll stopper clearance of the rear engine mount does not become zero even if the stopper comes into contact with the stopper and the stopper is elastically deformed thereafter. Therefore, a further sufficient vibration damping effect can be obtained.

According to a seventh aspect of the present invention, there is provided an engine support device in which an engine is supported on a vehicle body at four positions, namely, a front side and a rear side, and a left side and a right side, through engine mounts. Of the engine mounts, at least a pair of engine mounts for the front side and the rear side of the engine, or a pair of engine mounts for the left side and the right side of the engine have a stopper that limits the roll of the engine In the engine supporting device for supporting the engine on the vehicle body through the engine mounting frame, Df: Roll stopper clearance of the front engine mount, Lf: Shortest distance from the engine roll center to the center of the front engine mount, Db: Rear engine mount roll stopper clear Lb: Shortest distance from the engine roll center to the center of the rear engine mount Dl: Roll stopper clearance of the left engine mount Ll: Shortest distance from the engine roll center to the center of the left engine mount Dr: Right engine mount Roller stopper clearance Lr: Shortest distance from the engine roll center to the center of the right engine mount L'rb: Shortest distance from the imaginary line connecting the centers of the front and left engine mounts to the center of the right engine mount L ' bb: Df / Lf << Dr / Lr and Dl / Ll << Dr / Lr in a stationary state, where the shortest distance from the imaginary line connecting the centers of the front and left engine mounts to the center of the rear engine mounts And Df / Lf << Db / Lb and Dl / Ll << Db /Lb...(9) Dr / L'rb << Db / L'bb ... (10).

That is, if the shortest distance L and the roll stopper clearance D are set based on the relational expressions (9) and (10), the roll stopper clearance Db of the rear engine mount will not become 0 when the engine is rolled. First, the roll stopper clearance Df of the front engine mount and the roll stopper clearance Dl of the left engine mount become 0, and then the roll stopper clearance Dr of the right engine mount becomes 0.
Therefore, even when the engine uses the imaginary line connecting the front and left engine mounts as the roll center, the load can be reduced by supporting the front engine and the left and right engine mounts at three locations.

According to an eighth aspect of the present invention, there is provided an engine support device for supporting an engine on a vehicle body at four positions, namely, a front side and a rear side, and a left side and a right side, through engine mounts. Of the engine mounts, at least a pair of engine mounts for the front side and the rear side of the engine, or a pair of engine mounts for the left side and the right side of the engine have a stopper that limits the roll of the engine In the engine supporting device for supporting the engine on the vehicle body through the engine mounting frame, Df: Roll stopper clearance of the front engine mount, Lf: Shortest distance from the engine roll center to the center of the front engine mount, Db: Rear engine mount roll stopper clear Lb: Shortest distance from the engine roll center to the center of the rear engine mount Dl: Roll stopper clearance of the left engine mount Ll: Shortest distance from the engine roll center to the center of the left engine mount Dr: Right engine mount Roller stopper clearance Lr: Shortest distance from the engine roll center to the center of the right engine mount L'rb: Shortest distance from the virtual line connecting the centers of the front and left engine mounts to the center of the right engine mount L ' bb: 2 × (Df / Lf) ≦ Dr / Lr and 2 × (in the stationary state, where the shortest distance from the imaginary line connecting the centers of the front and left engine mounts to the center of the rear engine mounts Dl / Ll) ≦ Dr / Lr and 2 × (Df / Lf) ≦ b / Lb and 2 * (Dl / Ll) ≤Db / Lb ... (11) 2 * (Dr / L'rb) ≤Db / L'bb ... (12) It is what

That is, when the shortest distance L and the roll stopper clearance D are set based on the relational expressions (11) and (12), the roll stopper clearances D of the front side, left side and right side engine mounts are set depending on the roll of the engine.
Is 0, the roll stopper clearance of the rear engine mount does not become 0 even if the stopper comes into contact with the stopper and elastic deformation of the stopper occurs thereafter. Therefore, a further sufficient vibration damping effect can be obtained.

According to a ninth aspect of the present invention, there is provided an engine support device in which an engine is supported on a vehicle body at four positions, a front side and a rear side, and a left side and a right side, through engine mounts. Of the engine mounts, at least a pair of engine mounts for the front side and the rear side of the engine, or a pair of engine mounts for the left side and the right side of the engine have a stopper that limits the roll of the engine In the engine supporting device for supporting the engine on the vehicle body through the engine mounting frame, Df: Roll stopper clearance of the front engine mount, Lf: Shortest distance from the engine roll center to the center of the front engine mount, Db: Rear engine mount roll stopper clear Lb: Shortest distance from the engine roll center to the center of the rear engine mount Dl: Roll stopper clearance of the left engine mount Ll: Shortest distance from the engine roll center to the center of the left engine mount Dr: Right engine mount Roller stopper clearance Lr: The shortest distance from the engine roll center to the center of the right engine mount L'lc: The shortest distance from the virtual line connecting the centers of the front and right engine mounts to the center of the left engine mount L ' bc: Df / Lf << Dl / Ll and Dr / Lr << Dl / Ll in a stationary state, where the shortest distance from the imaginary line connecting the centers of the front and right engine mounts to the center of the rear engine mounts And Df / Lf << Db / Lb and Dr / Lr And is characterized in satisfying the relationship Db / Lb ··· (13) Dl / L'lc«Db / L'bc ··· (14).

That is, when the shortest distance L and the roll stopper clearance D are set based on the relational expressions (13) and (14), the roll stopper clearance Db of the rear engine mount is first set to 0 when the engine rolls. As a result, the roll stopper clearance Df of the front engine mount and the roll stopper clearance Dr of the right engine mount become 0, and then the roll stopper clearance Dl of the left engine mount becomes 0.
Therefore, even when the engine uses the imaginary line connecting the front and right engine mounts as the roll center, the load can be reduced by supporting the front engine and the left and right sides at three positions.

According to a tenth aspect of the present invention, in the engine support device of the present invention, the engine is supported on the vehicle body at four positions, the front side and the rear side, and the left side and the right side, through engine mounts.
Each of these engine mounts has a stopper that limits the roll of the engine,
At least the pair of engine mounts for the front side and the rear side of the engine, or the pair of engine mounts for the left side and the right side of the engine are configured to support the engine to the vehicle body via an engine mounting frame that is vibration-proofed to the vehicle body. In the engine support device, Df: Roll stopper clearance of the front engine mount Lf: Shortest distance from the engine roll center to the center of the front engine mount Db: Roll stopper clearance of the rear engine mount Lb: From the engine roll center to the rear engine Shortest distance to the center of the mount Dl: Roll stopper clearance of the left engine mount Ll: Shortest distance from the engine roll center to the center of the left engine mount Dr: Rolls of the right engine mount Clearance Lr: Shortest distance from the engine roll center to the center of the right engine mount L'lc: Shortest distance from the virtual line connecting the centers of the front and right engine mounts to the center of the left engine mount L'bc : 2 x (Df / Lf) ≤ in a stationary state, where the shortest distance from the imaginary line connecting the centers of the front and right engine mounts to the center of the rear engine mounts
Dl / Ll and 2 × (Dr / Lr) ≦ Dl / Ll and 2 × (Df / Lf) ≦ Db / Lb and 2 × (Dr / Lr) ≦ Db / Lb (15) 2 × It is characterized in that the relationship of (Dl / L'lc) ≤Db / L'bc (16) is satisfied.

That is, when the shortest distance L and the roll stopper clearance D are set based on the relational expressions (15) and (16), the roll stopper clearances D of the front side, the left side and the right side engine mount are set by the roll of the engine.
Becomes 0, the roller stopper comes into contact with the stopper, and even if elastic deformation of the stopper occurs thereafter, the roll stopper clearance of the rear engine mount does not become 0. Therefore, a sufficient vibration damping effect can be obtained.

An engine support device according to an eleventh aspect of the present invention is the engine support device according to any one of the first to tenth aspects, wherein the left and right engine mounts have external stoppers in an engine roll state. It is characterized by having a pressure receiving surface that receives the end surface of the engine mount over the entire area.

An engine support device according to a twelfth aspect of the present invention is the engine support device according to any one of the first to eleventh aspects, wherein the left and right engine mounts are mounted above the engine roll center. It is characterized by being supported on the vehicle body.

An engine support device according to a thirteenth aspect of the present invention is the engine support device according to any one of the first to twelfth aspects, wherein the engine mount includes an outer cylinder having a stopper on an inner peripheral surface, and the outer cylinder. Is an engine mount that has an inner cylinder that is concentrically coupled via an elastic body and has a clearance formed between the stopper and the elastic body.

An engine support device according to a fourteenth aspect of the present invention is the engine support device according to any one of the first to twelfth aspects, wherein the engine mount is a buffer rod.

[0040]

As described above, according to the present invention, the engine support device according to claim 1 supports the engine at the three positions of the front engine mount, the left engine mount and the right engine mount when the engine is rolled. However, it is possible to prevent the spring constant from rapidly increasing due to the contact with the stopper in the rear engine mount, significantly suppress the noise in the vehicle interior, and improve the comfort in the interior space.

The engine support device according to the second aspect of the present invention can obtain a further vibration damping effect as compared with the first aspect.

According to the engine support device of the present invention, when the engine is rolled, the engine is supported simultaneously at the three positions of the front, left and right engine mounts. Therefore, the front, left and right engine mounts are supported. Set mount (Df / Lf), (Dl / Ll), (Dr /
Lr) and set the rear engine mount (Db / L
Even if the difference from b) is small, it prevents the spring constant from rapidly increasing due to contact with the stopper on the rear engine mount,
It is possible to suppress noise in the vehicle interior and improve comfort.

The engine support device according to the fourth aspect of the present invention can obtain further effects as compared with the third aspect.

In the engine support device according to the present invention, when the engine is rolled, first, the left engine mount and the right engine mount are rolled as fulcrums, and then the front engine mount is added. Since the engine is supported at the location, the roll stopper clearance D of the left and right engine mounts becomes 0, and even when the engine rolls the virtual line connecting the left and right engine mounts to the roll center, it acts as a stopper in the rear engine mount. It is possible to prevent the spring constant from rapidly increasing due to the abutment of, and to significantly suppress the noise in the vehicle interior and improve the comfort.

The engine support device according to the sixth aspect of the present invention has further advantages as compared with the fifth aspect.

According to a seventh aspect of the present invention, in the engine supporting device according to the present invention, when the engine is rolled, first, the front engine mount and the left engine mount are rolled as fulcrums, and then the right engine mount is added. Since the engine is supported at the location, the roll stopper clearance D of the front and left engine mounts becomes 0, and even when the engine rolls the virtual line connecting the front and left engine mounts to the roll center, it acts as a stopper in the rear engine mount. It is possible to prevent the spring constant from rapidly increasing due to the abutment of, and to significantly suppress the noise in the vehicle interior and improve the comfort.

The engine support device according to the eighth aspect of the present invention has further advantages as compared with the seventh aspect.

According to the ninth aspect of the present invention, in the engine supporting device according to claim 9, when the engine is rolled, first, the front engine mount and the right engine mount are used as fulcrums, and then the left engine mount is added. Since the engine is supported at the location, the roll stopper clearance D of the front and right engine mounts becomes 0, and even when the engine rolls the virtual line connecting the front and right engine mounts to the roll center, it acts as a stopper in the rear engine mount. It is possible to prevent the spring constant from rapidly increasing due to the abutment of, and to significantly suppress the noise in the vehicle interior and improve the comfort.

According to the engine support device of the tenth aspect of the present invention, further advantageous effects can be obtained as compared with the ninth aspect.

An engine support device according to an eleventh aspect of the present invention is the engine support device according to any one of the first through tenth aspects, wherein the stoppers provided outside the left and right engine mounts have the entire end surface of the engine mount. Since it has a pressure receiving surface to receive, when the engine rolls, the engine mount end surface and the stopper can contact the entire surface, reducing the rapid increase in spring constant due to concentrated load at one point,
Noise can be further suppressed.

An engine support device according to a twelfth aspect of the present invention is the engine support device according to any one of the first to eleventh aspects, wherein the left and right engine mounts are arranged above the engine roll center and the engine is mounted on the vehicle body. Since it is supported on the vehicle body, the input direction of engine vibration is on the side of the vehicle body with low sensitivity, and noise can be further suppressed.

An engine support device according to a thirteenth aspect of the present invention is the engine support device according to any one of the first to twelfth aspects, wherein the engine mount includes an outer cylinder having a stopper on an inner peripheral surface, and the outer cylinder. Since the engine mount has an inner cylinder that is concentrically coupled via an elastic body and has a clearance formed between the stopper and the elastic body, the parts standard can be unified and the manufacturing process can be simplified. be able to.

According to a fourteenth aspect of the present invention, in the engine support device according to any one of the first to twelfth aspects, since the engine mount is a buffer rod, the same effect as the ninth aspect can be obtained. .

[0054]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an engine support device according to the present invention will be described in detail with reference to the accompanying drawings. 1 and 2 are conceptual views showing a first embodiment of an engine support device according to the present invention. FIG. 1 is a side view in which the left side of the drawing is the front of the vehicle, and FIG. The front view shown from the front is shown, of which, in FIG. 2, the vehicle body and the engine mounting frame shown in FIG. 1 are omitted. It should be noted that the engine support device disclosed herein has an engine mounting frame that is vibration-isolated and supported by the vehicle, and is applied to an FF vehicle (front engine for horizontal mounting / front wheel drive vehicle).

The engine 1 is disposed laterally with respect to the front-rear direction of the vehicle. The engine 1 is mounted on a subframe 3 which is vibration-supported by a vehicle body 4 via an insulator 5 made of an elastic material such as a rubber material. Front engine mount 2f
And the rear engine mount 2b.
The left engine mount 2l and the right engine mount 2r support the engine 1 on the vehicle body 4. That is, the engine 1 is supported by the vehicle body 4 through the four engine mounts 2 at the four positions of the front and rear sides and the left and right sides. However, as shown in FIG. 2, the engine 1 is combined with the transaxle 6 to form a power unit, and 7 shown in FIG. 1 is a final drive gear of the transaxle 6.

Reference numeral 10 denotes an engine roll center, which is shown in FIG.
As shown in FIG. 3, the left engine mount 2l and the right engine mount 2r have stoppers S on the outside to limit the roll of the engine 1 (in the drawing, only the stopper for the roll in the rearward direction of the vehicle is disclosed. ). At this time, it is preferable that the left and right engine mounts 21 and 2r are arranged above the engine roll center 10. However, in FIG. 1, in order to simplify the explanation,
The engine roll center 10 is shown as a single point.

FIG. 3 shows an embodiment of the engine mount 2 and shows the front engine mount 2f and the rear engine mount 2b in a stationary state before the engine roll, and these engine mounts have stoppers S on the inner peripheral surface.
2 has an outer cylinder O2 and an inner cylinder I2 concentrically coupled to the outer cylinder O2 via a rubber material R2 which is an elastic body. In this embodiment, the left and right engine mounts 2l, 2r has the same shape. When the engine 1 is supported by the subframe 3 or the vehicle body 4,
Even when the outer cylinder O2 of each engine mount 2 is coupled to the engine 1 and the inner cylinder I2 is coupled to the subframe 3 or the vehicle body 4, the inner cylinder I2 is coupled to the engine 1 and the outer cylinder O2 is coupled to the subframe. 3 or the vehicle body 4 may be combined.

Here, the length of the orthogonal line segment extending from the engine roll center 10 to the center of the front engine mount 2f, that is, the shortest distance from the engine roll center 10 to the center of the front engine mount 2f is L.
f, similarly, the shortest distance from the engine roll center 10 to the center of the rear engine mount 2b is Lb, and from the engine roll center 10 to the left engine mount 2l
Let Ll be the shortest distance to the center of the engine and Lr be the shortest distance from the engine roll center 10 to the center of the right engine mount 2r.

The roll stopper clearance between the rubber material Rf2 and the stopper Sf2 in the front engine mount 2f is Df, the roll stopper clearance in the rear engine mount 2b is Db, and the left engine mount 2l in the left engine mount 2l.
Let Dl be the roll stopper clearance between the end surface and the stopper S, and Dr be the roll stopper clearance in the right engine mount 2r.

In the engine support device according to the first embodiment, the relationship between the roll stopper clearance D and the shortest distance L from the engine roll center 10 to the center of the engine mount 2 is Df / Lf << Db / Lb and Dl / Ll << Db / Lb and Dr / Lr << Db / Lb (1) are set.

Next, the operation of the first embodiment will be described. FIG. 4 is a diagram showing the front engine mount 2f and the rear engine mount 2b in the roll state of the engine 1. Since the basic structure is the same as that of the conventional engine support device, referring to FIG. 11 showing a state in which the engine 1 is rolled, for example, when the vehicle starts to accelerate from a vehicle speed of 0 km / h, the engine 1 In the situation where the load is large, the engine 1 rolls rearward of the vehicle (clockwise direction θ in the drawing) around the engine roll center 10 by the torque reaction force. At this time, since the roll stopper clearance D of each engine mount 2 decreases in proportion to the distance from the engine roll center 10, the roll stopper clearance Df of the front engine mount 2f is changed to the rear engine mount 2b as shown in FIG. Since the roll stopper clearance D and the shortest distance L are set based on the relational expression (1), when the engine 1 rolls, as shown in FIG. 11 and FIG. Df, roll stopper clearance Dl, roll stopper clearance Dr
Becomes 0, and the engine mounts 2 are supported by the three engine mounts 2 on the front side, the left side, and the right side. That is, as shown in FIG. 4B, the large shared load on the rear engine mount 2b is reduced, and the roll stopper clearance Db between the rubber material Rb2 and the stopper Sb2 does not become 0 even when the engine 1 rolls. The spring constant of the rear engine mount 2b does not increase sharply.

By the way, in the front, left and right engine mounts, the roll stopper clearance D becomes 0 due to contact with the stoppers, so that the spring constant sharply increases and the vibration isolation performance deteriorates. 2f
Is coupled to a position near the resonance node (in front of the vehicle) in the subframe 3, so that noise is unlikely to be generated. Also,
The left and right engine mounts 2l, 2r are arranged substantially above the engine roll center 10 to support the engine 1 on the vehicle body 4, so that the input direction of engine vibration is the side of the vehicle body 4 with low sensitivity. Noise is unlikely to occur.

Therefore, when the engine 1 is rolling,
The front side engine mount 2f and the left and right side engine mounts 2l and 2r support the engine 1 at three locations, and by preventing the spring constant from rapidly increasing due to contact with the stopper Sb2 on the rear side engine mount 2b, It is possible to significantly reduce noise and improve comfort in an indoor space.

Further, since the stopper S2 in the engine mount 2 and the stopper S connected to the vehicle body 4 are generally made of rubber material or the like for preventing abnormal noise generated when the engine 1 is rolled, the stopper clearance Some deformation occurs even after D becomes 0. For this reason,
(Db / Lb) is (Df / Lf), (Dl / Ll),
It is important to make it larger than (Dr / Lr),
It is desirable that (Db / Lb) be approximately twice or more the above three ratios. Therefore, based on 2 * (Df / Lf) ≤Db / Lb and 2 * (Dl / Ll) ≤Db / Lb and 2 * (Dr / Lr) ≤Db / Lb (2), the shortest When the distance L and the roll stopper clearance D are set, even if the roll stopper clearance D of the front side and the left and right engine mounts becomes 0 due to the roll of the engine 1 and elastic deformation of the stopper occurs further, the rear engine Since the roll stopper clearance Db of the mount 2b does not become 0, a sufficient vibration damping effect can be obtained even after the stoppers Sf2 and S of the front, left and right engine mounts are deformed.

FIG. 5 is a time chart of the vehicle interior noise level (dB) over time. The solid line a is the engine support device according to the present invention, and the broken line b is the conventional engine support device. As is clear from this figure, the noise level (dB) in the vehicle compartment is greatly reduced in a traveling state where the vehicle speed is low and engine noise is noticeable.

Next, a second embodiment will be described. The basic configuration is similar to that of the first embodiment, and the relationship between the shortest distance L from the engine roll center 10 to the center of the engine mount 2 and the roll stopper clearance D is in a stationary state. , Df / Lf≈Dl / Ll≈Dr / Lr << Db / Lb (3)

The operation of the second embodiment is also substantially the same as that of the first embodiment, but if the shortest distance L and the roll stopper clearance D are set based on the relational expression (3), the engine 1 When rolling, the roll stopper clearance Df, the roll stopper clearance Dl,
The roll stopper clearance Dr becomes 0 almost at the same time, and the roll reaction force is simultaneously supported by the three engine mounts on the front side, the left side, and the right side. Therefore, as the engine 1 rolls, the stopper clearances on the front side, the left side, and the right side engine mounts are stopped. When D becomes 0 sequentially, the position of the engine roll center 10 changes and the rear engine mount 2b
Does not set the stopper clearance D to 0 before the other engine mounts 2.

That is, since the front, left and right engine mounts come into contact with the respective stoppers at the same time, the engine roll center caused by the contact time difference between the stopper Sf2 or the stopper S of the front, left and right engine mounts 2 The fluctuation of 10 is suppressed, the shortest distance L from the engine roll center 10 to the center of each engine mount 2 is prevented from changing due to the fluctuation, and the relationship of Expression (3) is prevented from being broken, and the rear engine mount 2b is prevented. It is possible to sufficiently reduce the increase in the shared load.

Therefore, when the rear engine mount 2b is set (Db / Lb), the front, left and right engine mounts are set (Df / Lf), (Dl / Ll),
Even if the difference from (Dr / Lr) is small, the fluctuation of the engine roll center 10 is prevented, and the spring constant is prevented from rapidly increasing due to the contact with the stopper Sb2 in the rear engine mount 2b, thereby suppressing noise. it can.

Also at this time, if a rubber material or the like is used for the stopper of each engine mount, some deformation occurs even after the stopper clearance D becomes zero. For this reason,
(Db / Lb) is (Df / Lf), (Dl / Ll),
It is important that it is larger than (Dr / Lr), and (D
It is desirable that b / Lb) is approximately twice or more of these three ratios. Therefore, if the relationship of 2 × (Df / Lf) ≈2 × (Dl / Ll) ≈2 × (Dr / Lr) ≦ Db / Lb (4) is satisfied, as in the first embodiment, Front side,
Even after the stoppers Sf2 and S of the left and right engine mounts are deformed, sufficient vibration damping effect can be obtained.

Further, a third embodiment will be described. FIG.
FIG. 3 is a conceptual diagram showing the engine support device from the front of the vehicle, and the basic configuration is the same as that of the first embodiment. In this drawing, the subframe 3 and the vehicle body 4 are omitted, and 11 is a virtual line connecting the center of the left engine mount 2l and the center of the right engine mount 2r.

In addition to the roll stopper clearance D of each engine mount and the shortest distance L from the engine roll center 10 to the center of the engine mount 2 shown in the first and second embodiments, from the virtual line 11 L'is the shortest distance to reach the center of the front engine mount 2f.
fa, L'ba is the shortest distance from the virtual line 11 to the center of the rear engine mount 2b.
These relationships are Dl / Ll << Df / Lf and Dr / Lr << Df / Lf and Dl / Ll << Db / Lb and Dr / Lr << Db / Lb (5) Df / L'fa << Db / L'ba ... (6) Set so as to satisfy.

The operation of this embodiment is also substantially the same as that of the first embodiment, but when the engine 1 rolls, the roll stopper clearance Dl and the roll stopper clearance Dr are first calculated from the relational expression (5). Becomes 0, the virtual line connecting the left engine mount 2l and the right engine mount 2r is rolled to the roll center, and then from the relational expression (6), the roll stopper clearance Df becomes 0, and the front side, the left side, and the left side are detected. Since the roll reaction force is supported at three places on the right side, the stopper clearance D between the left and right side and the front side engine mount is accompanied by the roll of the engine 1.
Becomes 0 sequentially, the rear stopper clearance Db
Does not reach 0 before the front stopper clearance Df.

That is, in the third embodiment, the left and right engine mounts 2l, 2r having the stoppers S made of an elastic material thinner than the other engine mounts 2 are used because the speed at the time of engine roll is slow. After contacting the stopper S, the front engine mount 2f contacts the stopper Sf2. Therefore, the engine 1 can be supported at three positions, the front side, the left side, and the right side, and the share load of the rear engine mount 2b can be reduced. .

Therefore, the left and right engine mounts 2
Even when the engine 1 rolls the virtual line connecting the left and right engine mounts 2l, 2r to the roll center, the rear engine mount 2b does not abut the stopper Sb2. 2b
It is possible to prevent a sudden increase in the spring constant in the vehicle, significantly suppress noise in the vehicle compartment, and improve comfort.

Also at this time, with the stoppers Sf2 and S,
Since some deformation occurs even after the stopper clearance D becomes 0, it is desirable that the right side of each inequality in relational expressions (5) and (6) is approximately twice or more the left side. Therefore, 2 * (Dl / Ll) ≤Df / Lf and 2 * (Dr / Lr) ≤Df / Lf and 2 * (Dl / Ll) ≤Db / Lb and 2 * (Dr / Lr) ≤Db /Lb...(7) 2 * (Df / L'fa) ≤Db / L'ba ... (8) If the relationship of (8) is satisfied, the stoppers Sf2 and S are deformed as in the first embodiment. However, a sufficient vibration damping effect can be obtained.

In the third embodiment, when the engine 1 is rolled, generally, the roll stopper clearances Dl and Dr of the left and right engine mounts are often 0 first, so that the center of the left engine mount 2l and Although the shortest distance L ′ to reach the center of another engine mount 2 has been described with reference to the virtual line 11 connecting the center of the right engine mount 2r, of course, as the fourth embodiment,
When the roll stopper clearances Df and Dl of the front and left engine mounts are initially 0, as in the third embodiment, the right engine mount 2r is drawn from the virtual line connecting the front engine mount 2f and the left engine mount 2l. The shortest distance to reach L'rb, from the virtual line,
L'is the shortest distance to reach the rear engine mount 2r.
bb, in the stationary state, these relations are Df / Lf << Dr / Lr and Dl / Ll << Dr / Lr and Df / Lf << Db / Lb and Dl / Ll << Db / Lb ... ( 9) If it is set to satisfy Dr / L'rb << Db / L'bb (10), the front and left engine mounts 2f, 2l will contact the stoppers when the engine 1 rolls, and then the right engine Since the mount 2r supports three places, the rear engine mount 2b does not abut the stopper Sb2 even when the engine 1 rolls the virtual line connecting the front and left engine mounts 2f and 2l to the roll center. It is possible to significantly reduce the noise in the room and improve comfort.

Also at this time, the stoppers Sf2 and S are
Since some deformation occurs even after the stopper clearance D becomes 0, it is desirable that the right side of each inequality in relational expressions (9) and (10) is approximately twice or more the left side. Therefore, 2 × (Df / Lf) ≦ Dr / Lr and 2 × (Dl / Ll) ≦ Dr / Lr and 2 × (Df / Lf) ≦ Db / Lb and 2 × (Dl / Ll) ≦ Db /Lb...(11) 2 * (Dr / L'rb) ≤Db / L'bb ... (12) If the following is satisfied, the front side and the left and right engine mounts are mounted as in the first embodiment. Even after the stoppers Sf2 and S are deformed, a sufficient vibration damping effect can be obtained.

Further, as a fifth embodiment, the roll stopper clearance Df of the front and right engine mounts is set.
, Dr first becomes 0, the shortest distance L′ l from the virtual line connecting the front engine mount 2f and the right engine mount 2r to the left engine mount 2r.
c, the shortest distance L′ bc from the imaginary line to the rear engine mount 2b, and in a stationary state, these relationships are Df / Lf << Dl / Ll and Dr / Lr << Dl / Ll and Df / Lf << Db / Lb and Dr / Lr << Db / Lb ... (13) Dl / L'lc << Db / L'bc ... First, the front and right engine mounts 2f and 2r come into contact with each other, and then the left engine mount 2l supports three places, so that the engine 1 uses the virtual line connecting the front and right engine mounts 2f and 2r as the roll center. Even when rolling, the rear engine mount 2b does not abut, so that noise in the vehicle interior can be significantly suppressed and comfort can be improved.

At this time as well, some deformation occurs in each stopper even after the stopper clearance D becomes 0. Therefore, the right side of the inequalities in the relational expressions (13) and (14) is more than twice the left side. Is desirable. Therefore, 2 × (Df / Lf) ≦ Dl / Ll and 2 × (Dr / Lr) ≦ Dl / Ll and 2 × (Df / Lf) ≦ Db / Lb and 2 × (Dr / Lr) ≦ Db / Lb (15) 2 × (Dl / L'lc) ≦ Db / L'bc (16) If the following conditions are satisfied, the front side and the left and right engine mounts are mounted. Even after the stoppers Sf2 and S are deformed, a sufficient vibration damping effect can be obtained.

Further, the stopper S according to the present invention, which the left and right engine mounts have on the outside, will be described in detail. FIG. 7A shows an embodiment of the stopper S according to the present invention, and FIG. 7B is a view showing a conventional stopper So. The stopper S in the present embodiment is an elastic body such as a rubber material and has the same basic configuration as being connected to the vehicle body 4, but is similar to the conventional stopper So, but the conventional stopper So is in a stationary state. While the pressure receiving surface for receiving the engine mount 2 is parallel to the end surface of the engine mount, the stopper S according to the present invention is used.
Has a fan-shaped cross section so that the end surface of the engine mount can be received over the entire area in the engine roll state.

Next, the operation of the stopper S will be described in detail. The left and right engine mounts 2l, 2r located near the engine roll center 10 change the inclination of the end face of the engine mount with the engine roll and abut on the stopper S. Therefore, in the stationary state, the conventional stopper S in which the end surface of the engine mount and the stopper S are parallel to each other
With o, only part of the end face of the engine mount is supported. As a result, the spring constant at the engine mount 2l (2r) increases. However, in the stopper S according to the present invention, since the rubber material has a fan-shaped cross-section, the end surface of the engine mount and the stopper S can be brought into full contact with each other in an engine roll state, and the spring constant is rapidly increased by a concentrated load at one point. Noise can be further suppressed by reducing the noise.

As described above, the engine support device according to the present invention can provide excellent vibration and soundproofing effects as compared with the conventional one. In the present embodiment, the same engine mount is used for the front side and the rear side, and the left side and the right side to unify the part specifications and simplify the manufacturing process.This is because the engine mount is a buffer rod. However, the same effect can be obtained. Further, although the engine support device disclosed herein is an FF vehicle as a drive system, of course,
It may be an R vehicle (front engine / rear wheel drive vehicle), and the arrangement and shape of the subframe vibration-supported by the vehicle body are not limited to this.

[Brief description of drawings]

FIG. 1 is a conceptual view showing an embodiment of an engine support device of the present invention from the side.

FIG. 2 is a conceptual diagram showing the same embodiment from the front.

FIG. 3 is a configuration diagram showing an embodiment of front and rear engine mounts.

FIG. 4 is an explanatory view showing both engine mounts in a roll state in the same example.

FIG. 5 is a time chart showing the noise level in the engine support device of the present invention in time series.

FIG. 6 is a conceptual diagram illustrating a third embodiment of the engine support device of the present invention.

FIG. 7 (a) is an explanatory view showing an embodiment of the stopper S of the present invention. (B) is a conventional stopper S
It is explanatory drawing which showed o.

FIG. 8 is a conceptual diagram showing a rigid body vibration mode of the subframe 3.

FIG. 9 is a perspective view showing a specific example of an engine mounting frame.

FIG. 10 is a conceptual diagram showing a side view of a conventional engine support device.

FIG. 11 is an explanatory diagram showing an engine roll state in the engine support device.

FIG. 12A is a configuration diagram showing front and rear engine mounts. (B) is explanatory drawing which showed both engine mounts of the same example in the roll state.

[Explanation of symbols]

 1 engine 2 engine mount 3 subframe 4 vehicle body 5 insulator 6 transaxle 7 final drive gear O2 outer cylinder I2 inner cylinder R2 rubber material S2, S stopper

Claims (14)

[Claims] 1. An engine is supported on a vehicle body at four positions, a front side and a rear side, and a left side and a right side, through engine mounts, and each of these engine mounts has stoppers for limiting the roll of the engine. Among the mounts, at least a pair of engine mounts for the front side and the rear side of the engine, or a pair of engine mounts for the left side and the right side of the engine support the engine on the vehicle body via an engine mounting frame that is vibration-isolated on the vehicle body. In the engine support device configured as described above, the engine support device satisfies the following conditions when the vehicle body is stationary. Note Df / Lf << Db / Lb and Dl / Ll << Db / Lb
Moreover, Dr / Lr << Db / Lb Df: Roll stopper clearance of front engine mount Lf: Shortest distance from engine roll center to center of front engine mount Db: Roll stopper clearance of rear engine mount Lb: Engine roll center To the center of the rear engine mount Dl: Roll stopper clearance of the left engine mount Ll: Shortest distance from the engine roll center to the center of the left engine mount Dr: Roll stopper clearance of the right engine mount Lr: The shortest distance from the engine roll center to the center of the right engine mount 2. The engine is supported on the vehicle body at four positions, namely, the front side and the rear side, and the left side and the right side, through engine mounts, and each of these engine mounts has stoppers for limiting the roll of the engine. Among the mounts, at least a pair of engine mounts for the front side and the rear side of the engine, or a pair of engine mounts for the left side and the right side of the engine support the engine on the vehicle body via an engine mounting frame that is vibration-isolated on the vehicle body. In the engine support device configured as described above, the engine support device satisfies the following conditions when the vehicle body is stationary. Note 2 × (Df / Lf) ≦ Db / Lb and 2 × (Dl / L
l) ≤Db / Lb and 2 × (Dr / Lr) ≤Db / L
b Df: Roll stopper clearance of front engine mount Lf: Shortest distance from engine roll center to center of front engine mount Db: Roll stopper clearance of rear engine mount Lb: From engine roll center to center of rear engine mount Shortest distance to reach Dl: Roll stopper clearance of left engine mount Ll: Shortest distance from engine roll center to the center of left engine mount Dr: Roll stopper clearance of right engine mount Lr: From engine roll center to right engine mount Shortest distance to the center 3. The engine is supported on the vehicle body at four positions, namely, the front side and the rear side, and the left side and the right side, through engine mounts, and each of these engine mounts has stoppers for limiting the roll of the engine. Among the mounts, at least a pair of engine mounts for the front side and the rear side of the engine, or a pair of engine mounts for the left side and the right side of the engine support the engine on the vehicle body via an engine mounting frame that is vibration-isolated on the vehicle body. In the engine support device configured as described above, the engine support device satisfies the following conditions when the vehicle body is stationary. Note Df / Lf≈Dl / Ll≈Dr / Lr << Db / Lb Df: Roll stopper clearance of front engine mount Lf: Shortest distance from engine roll center to center of front engine mount Db: Roll of rear engine mount Stopper clearance Lb: Shortest distance from the engine roll center to the center of the rear engine mount Dl: Roll stopper clearance of the left engine mount Ll: Shortest distance from the engine roll center to the center of the left engine mount Dr: Right engine Mount roll stopper clearance Lr: Shortest distance from the engine roll center to the center of the right engine mount 4. The engine is supported on the vehicle body at four positions on the front side and the rear side and on the left side and the right side through engine mounts, and each of these engine mounts has stoppers for limiting the roll of the engine. Among the mounts, at least a pair of engine mounts for the front side and the rear side of the engine, or a pair of engine mounts for the left side and the right side of the engine support the engine on the vehicle body via an engine mounting frame that is vibration-isolated on the vehicle body. In the engine support device configured as described above, the engine support device satisfies the following conditions when the vehicle body is stationary. Note 2 × (Df / Lf) ≈2 × (Dl / Ll) ≈2 × (Dr
/ Lr) ≤ Db / Lb Df: Roll stopper clearance of front engine mount Lf: Shortest distance from engine roll center to center of front engine mount Db: Roll stopper clearance of rear engine mount Lb: Rear of engine roll center Shortest distance to the center of side engine mount Dl: Roll stopper clearance of left engine mount Ll: Shortest distance from engine roll center to center of left engine mount Dr: Roll stopper clearance of right engine mount Lr: Engine roll The shortest distance from the center to the center of the right engine mount 5. The engine is supported on the vehicle body at four positions of front side and rear side and left side and right side via engine mounts, and each of these engine mounts has stoppers for limiting the roll of the engine. Among the mounts, at least a pair of engine mounts for the front side and the rear side of the engine, or a pair of engine mounts for the left side and the right side of the engine support the engine on the vehicle body via an engine mounting frame that is vibration-isolated on the vehicle body. In the engine support device configured as described above, the engine support device satisfies the following conditions when the vehicle body is stationary. Note Dl / Ll << Df / Lf and Dr / Lr << Df / Lf
And Dl / Ll << Db / Lb and Dr / Lr << Db
/ Lb Df / L'fa << Db / L'ba Df: Roll stopper clearance of front engine mount Lf: Shortest distance from engine roll center to center of front engine mount Db: Roll stopper clearance of rear engine mount Lb : Shortest distance from the engine roll center to the center of the rear engine mount Dl: Roll stopper clearance of the left engine mount Ll: Shortest distance from the engine roll center to the center of the left engine mount Dr: Roll of the right engine mount Stopper clearance Lr: Shortest distance from the engine roll center to the center of the right engine mount L'fa: Shortest distance from the virtual line connecting the centers of the left and right engine mounts to the center of the front engine mount L'ba: Left side And the shortest distance from the virtual line connecting the center of the right engine mount to the center of the rear engine mount 6. The engine is supported on the vehicle body at four positions of front and rear sides and left and right sides through engine mounts, and each of these engine mounts has stoppers for limiting the roll of the engine. Among the mounts, at least a pair of engine mounts for the front side and the rear side of the engine, or a pair of engine mounts for the left side and the right side of the engine support the engine on the vehicle body via an engine mounting frame that is vibration-isolated on the vehicle body. In the engine support device configured as described above, the engine support device satisfies the following conditions when the vehicle body is stationary. 2 × (Dl / Ll) ≦ Df / Lf and 2 × (Dr / L
r) ≤Df / Lf and 2 × (Dl / Ll) ≤Db / L
b and 2 × (Dr / Lr) ≦ Db / Lb 2 × (Df / L′ fa) ≦ Db / L′ ba Df: Roll stopper clearance of front engine mount Lf: Center of engine roll center to front engine mount Shortest distance to reach Db: Roll stopper clearance of rear engine mount Lb: Shortest distance from engine roll center to the center of rear engine mount Dl: Roll stopper clearance of left engine mount Ll: Engine left side from engine roll center The shortest distance to the center of the mount Dr: Roll stopper clearance of the right engine mount Lr: The shortest distance from the engine roll center to the center of the right engine mount L'fa: A virtual line connecting the centers of the left and right engine mounts From inside the front engine mount Shortest distance to the heart L'ba: Shortest distance from the imaginary line connecting the centers of the left and right engine mounts to the center of the rear engine mounts 7. The engine is supported on the vehicle body at four positions of front and rear sides and left and right sides through engine mounts, and each of these engine mounts has stoppers for limiting the roll of the engine. Among the mounts, at least a pair of engine mounts for the front side and the rear side of the engine, or a pair of engine mounts for the left side and the right side of the engine support the engine on the vehicle body via an engine mounting frame that is vibration-isolated on the vehicle body. In the engine support device configured as described above, the engine support device satisfies the following conditions when the vehicle body is stationary. Note Df / Lf << Dr / Lr and Dl / Ll << Dr / Lr
And Df / Lf << Db / Lb and Dl / Ll << Db
/ Lb Dr / L'rb << Db / L'bb Df: Roll stopper clearance of front engine mount Lf: Shortest distance from engine roll center to center of front engine mount Db: Roll stopper clearance of rear engine mount Lb : Shortest distance from the engine roll center to the center of the rear engine mount Dl: Roll stopper clearance of the left engine mount Ll: Shortest distance from the engine roll center to the center of the left engine mount Dr: Roll of the right engine mount Stopper clearance Lr: Shortest distance from the engine roll center to the center of the right engine mount L'rb: Shortest distance from the imaginary line connecting the centers of the front and left engine mounts to the center of the right engine mount L'bb: Front side And the shortest distance from the virtual line connecting the center of the left engine mount to the center of the rear engine mount 8. The engine is supported on the vehicle body at four positions, namely, on the front side and the rear side, and on the left side and the right side, through engine mounts, and each of these engine mounts has stoppers for limiting the roll of the engine. Among the mounts, at least a pair of engine mounts for the front side and the rear side of the engine, or a pair of engine mounts for the left side and the right side of the engine support the engine on the vehicle body via an engine mounting frame that is vibration-isolated on the vehicle body. In the engine support device configured as described above, the engine support device satisfies the following conditions when the vehicle body is stationary. 2 × (Df / Lf) ≦ Dr / Lr and 2 × (Dl / L)
l) ≤Dr / Lr and 2 × (Df / Lf) ≤Db / L
b and 2 × (Dl / Ll) ≦ Db / Lb 2 × (Dr / L′ rb) ≦ Db / L′ bb Df: Roll stopper clearance of front engine mount Lf: Center of engine roll center to front engine mount Shortest distance to reach Db: Roll stopper clearance of rear engine mount Lb: Shortest distance from engine roll center to the center of rear engine mount Dl: Roll stopper clearance of left engine mount Ll: Engine left side of engine roll center Shortest distance to the center of the mount Dr: Roll stopper clearance of the right engine mount Lr: Shortest distance to the center of the right engine mount from the engine roll center L'rb: Virtual line connecting the centers of the front and left engine mounts From inside the right engine mount Shortest distance to the heart L'bb: Shortest distance from the virtual line connecting the centers of the front and left engine mounts to the center of the rear engine mounts 9. The engine is supported on the vehicle body at four positions, namely, the front side and the rear side, and the left side and the right side, via engine mounts, and each of these engine mounts has stoppers for limiting the roll of the engine. Among the mounts, at least a pair of engine mounts for the front side and the rear side of the engine, or a pair of engine mounts for the left side and the right side of the engine support the engine on the vehicle body via an engine mounting frame that is vibration-isolated on the vehicle body. In the engine support device configured as described above, the engine support device satisfies the following conditions when the vehicle body is stationary. Note Df / Lf << Dl / Ll and Dr / Lr << Dl / Ll
And Df / Lf << Db / Lb and Dr / Lr << Db
/ Lb Dl / L'lc << Db / L'bc Df: Roll stopper clearance of front engine mount Lf: Shortest distance from engine roll center to center of front engine mount Db: Roll stopper clearance of rear engine mount Lb : Shortest distance from the engine roll center to the center of the rear engine mount Dl: Roll stopper clearance of the left engine mount Ll: Shortest distance from the engine roll center to the center of the left engine mount Dr: Roll of the right engine mount Stopper clearance Lr: Shortest distance from the engine roll center to the center of the right engine mount L'lc: Shortest distance from the imaginary line connecting the centers of the front and right engine mounts to the center of the left engine mount L'bc: Front side And the shortest distance from the virtual line connecting the center of the right engine mount to the center of the rear engine mount 10. The engine is supported on the vehicle body at four positions of front and rear sides and left and right sides through engine mounts, and each of these engine mounts has stoppers for limiting the roll of the engine. Among the mounts, at least a pair of engine mounts for the front side and the rear side of the engine, or a pair of engine mounts for the left side and the right side of the engine support the engine on the vehicle body via an engine mounting frame that is vibration-isolated on the vehicle body. In the engine support device configured as described above, the engine support device satisfies the following conditions when the vehicle body is stationary. 2 × (Df / Lf) ≦ Dl / Ll and 2 × (Dr / L
r) ≦ Dl / Ll and 2 × (Df / Lf) ≦ Db / L
b and 2 × (Dr / Lr) ≦ Db / Lb 2 × (Dl / L′ lc) ≦ Db / L′ bc Df: Roll stopper clearance of front engine mount Lf: Center of engine roll center to front engine mount Shortest distance to reach Db: Roll stopper clearance of rear engine mount Lb: Shortest distance from engine roll center to the center of rear engine mount Dl: Roll stopper clearance of left engine mount Ll: Engine left side from engine roll center Shortest distance to the center of the mount Dr: Roll stopper clearance of the right engine mount Lr: Shortest distance from the engine roll center to the center of the right engine mount L'lc: Virtual line connecting the center of the front and right engine mounts From inside the left engine mount Shortest distance to the heart L'bc: Shortest distance from the virtual line connecting the centers of the front and right engine mounts to the center of the rear engine mounts 11. The stopper according to claim 1, wherein the stoppers provided outside the left and right engine mounts each have a pressure receiving surface that receives the entire end surface of the engine mount in an engine roll state. Engine support device characterized by. 12. The engine support according to claim 1, wherein the left and right engine mounts support the engine on a vehicle body at a position above an engine roll center. apparatus. 13. The engine mount according to claim 1, wherein the engine mount includes an outer cylinder having a stopper on an inner peripheral surface thereof, and an inner cylinder concentrically coupled to the outer cylinder via an elastic body. And an engine mount having a clearance between the stopper and the elastic body. 14. The engine support device according to claim 1, wherein the engine mount is a buffer rod.